docs: def get_observed_strains_and_df(observation, observation_dict):
      """
      observation example: 'ros_simulated'
      observation_dict example: {'ros_simulated': [['NT12204_755', 'wt'], ['NT12120_270', 'wt'], ...] ...}
      """
      observed_df = pd.DataFrame.from_records(observation_dict[observation], columns=['strain','phenotype']).set_index('strain')
      observed_strains = observed_df.index.tolist()
      return observed_strains, observed_df